Electric battery



E. L. MARSHALL.

ELECTRIC BATTERY- APPLICATION FILED FEB.,I8. 1915.

Emma 00. 31, 19220 INVENTOR. EL, MAR SHELL m Q 9; MW

ATTORNEY Patented @ct. 331, 11922.

entree stare meant .rear @JFFHQE.

EDWARD E. MAIL, L? FREMQNT, OIELTO, ASSIGNQR, lBiZ MESNEASSIGNTLIENTS, T0 NATEQNAL GARBUN COMPANY, TING, A CORPORATION 018 NEW YQRK.

- ELECTRIC BATTERY.

To all whom '6 may concern Be it known that I, lEnwAnn L. MARgil-ALL, a citizen of the United States, residing at.

. Fremont, in the county of Sandusky and State of-Ohi have invented a certain new and useful mprovement in Electric Batteries', of which the following is a full, clear, and exact description.

My invention relates to electric batteries, and more particularly to dry cells.

Dry cells consist usually of a zinc can with a central carbon electrode and a mix" packed between the two. llt is necessary to keep the depol rizer in the'mix fromreaching the zinc c231, and therefore it has been the practice to put a porous separating medium' between the zinc and the mix This medium is ma e of cheese cloth some cases, and 0f blotting paper, pulpboard or strawboard in others.

The porousmedium also acts as a reservoir for the electrolyte, but inasmuch as all such bibulous linings .or separating mediums I have found that the paste in a dry cell slowly difiuses through the lining and gets beyond the region where it can performits useful function. This causes the life of the cell to be shortened, both on shelf and in service. In attempting to prevent this, ll have found that if the paste is left in the raw, uncooked condition, it diffuses much more slowly through the lining, and therefore it is retained in the-desired place. Consequently the use of uncooked paste causes a remarkable increase in'the'shelf life and service "life of the cell.

Application filed February 18, 1915. Serial lilo. 9,185.-

Uncooked aste' of flour and water is somewhat di cult to handle in applying the same to the dry cell, and therefore I sometimes add a small quantity of cooked paste to stifi'en the same and make it easier to handle. F or this reason more or less of cooked paste can be added if desired.

- The uncooked pastecan-be applied to wet linings in the usual way, but it is preferably applied to a dry lining and then thoroughly dried. The dry lining is then placed in the battery can, wetted with water. or electrolyte, and the'cell is finished in the usual way.

' I believe that I am the first to discover that raw, uncooked paste of flour or starchy material is beneficial in dry cell manufacture, and my invention is not to be limited to any particular lining or. separating medium, as such paste can perform its function regardless of the separating medium.

Referring to the single figure of the drawing, the zinc can 1' contains the mix 2 packed around a carbon electrode 3, the

zinc being separated from the mix bya.

bibulous lining a which has a coating 5 of the paste referred to.

Having described my invention, what I claim is: I

1.111 a dry cell of thecarbon-manganese peroxide type, a container electrode, a

porous paper lining adjacent thereto, and

.raw, uncooked flour between the containerand said lining.

2. In a dry cell, a container electrode, a

central electrode, depolarizing mix around the central electrode, a porous envelope surrounding said mix, and uncooked flour paste in contact with the inner surface of the container electrode and with the porous envelope.

In testimony whereof, I hereunto aflix my signature. I I 7 nnwann t; MARSHALL.

Witnesses line J. AnAMs, H. G. Gaovnn. 

